The charm of Nick Park's Wallace and Gromit animations depends on their summoning up of a cosy, gentle and resolutely mythical England that's part Ealing comedies and part 1950s seaside picture postcards. They're also, of course, superb animated characters. They first appeared in 1989, in a made-for-TV half-hour short called A Grand Day Out, which introduced us to the dim-witted amateur inventor Wallace (brilliantly voiced by Peter Sallis), who loves cheese to distraction and is constantly saved from disaster by his infinitely smarter dog, Gromit. ...